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如何在自定义视图类(android)中获取活动子视图

findviewbyid android-custom-view android-studio android

0

Antenna_ · 技术社区 · 7 年前

public class CustomWebView extends WebView {

private Context context;
private ActionMode mActionmode;
private ActionMode.Callback mActionModeCallback;
private SearchView searchView;


public CustomWebView(Context context){
    super(context);
    this.context = context;
}

public CustomWebView(Context context, AttributeSet attrs){

    super(context,attrs);
    this.context = context;
    WebSettings webSettings = this.getSettings();
    webSettings.setJavaScriptEnabled(true);
    this.addJavascriptInterface(new JavaScriptInterface(), "JavaScriptInterface");


    this.setOnLongClickListener(new View.OnLongClickListener(){

        @Override
        public boolean onLongClick(View v) {

            if (mActionmode != null)
                return false;

            mActionmode = startActionMode(mActionModeCallback);
            v.setSelected(true);
            return true;
        }
    });

    Log.w("test",context.toString());
    searchView =  ((Activity)context).findViewById(R.id.searchView);
}

我想从活动(customwebview的父视图)中获取searchview。但此代码生成错误消息。

searchView =  ((Activity)context).findViewById(R.id.searchView);

我想调用searchview的方法,但它有空值。

2 回复 | 直到 7 年前

1

nishant 7 年前

您需要在活动中初始化searchview并将其传递给customwebview 将此添加到customwebview类

Searchview searchview;
public void setSearchview(Searchview 
searchview){ this.searchview=searchvie
w}
// then call whatever functions you 
 want on searchview

2

1

Vijendra patidar 7 年前

您需要在SearchView的构造函数中再使用一个参数

public CustomWebView(Context context, SearchView searchView){
    super(context);
    this.context = context;
    this.searchView = searchView;
}